Ask Your Question

root disk and ephemeral disk

asked 2014-05-07 04:08:35 -0500

qmo gravatar image

updated 2014-06-20 14:53:56 -0500

rbowen gravatar image


I'm having some troubles with the root Disk in Openstack (RDO). I have 3 nodes on my install, 1 controller (with glance,cinder, neutron,nova,swift) and 2 compute nodes (with nova-compute).

When I create VM with root disk the instance cannot see the disks but when I use ephemeral disk the instance see the disks. I can create volume with no error.

I don't know where to look for errors.

Could someone tell me where to look to find the problem ?

Thanks, qmo

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2014-06-23 04:07:06 -0500

fifieldt gravatar image

Check the firewalls between your cinder and your nova-computes.

ephemeral storage uses the local storage on nova-compute, whereas cinder uses the network to mount the storage, so it could be failing there.

You can find more information by looking in the


of the compute node where the VM is trying to start.

It's also worth checking the status of cinder, to make sure its worth properly.

edit flag offensive delete link more

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2014-05-07 04:08:35 -0500

Seen: 2,528 times

Last updated: Jun 23 '14